Pyrolysis device for recovering precious metal from waste catalyst

Abstract

The invention discloses a pyrolysis device for recovering precious metal from a waste catalyst, and relates to the technical field of pyrolysis. The pyrolysis device for recycling the precious metal from the waste catalyst comprises a rack, a pyrolysis mechanism and a feeding mechanism, the pyrolysis mechanism comprises a pyrolysis furnace and a heating ring, a protective cover shell is fixedly installed in the middle of the surface of the pyrolysis furnace, a heat utilization assembly is installed on the side of the surface of the protective cover shell, and the feeding mechanism comprises a stock bin and a feeding hopper. A servo motor is fixedly installed in the rectangular frame on the outer side of the stock bin, the output end of the servo motor is fixedly connected with V-shaped teeth, a cross beam is slidably installed between the two symmetrical sides of the inner wall of the pyrolyzing furnace, the bottom of the cross beam is fixedly connected with three-jaw tip crushing teeth, and a connecting square rod is hinged between the end, extending to the outer side of the stock bin, of the cross beam and one end of the surface of each V-shaped tooth. The rotary material receiving assembly is installed in the middle of the inner cavity of the stock bin, the pretreatment purpose is achieved, materials can be pretreated, the size of the materials is reduced, sufficient pyrolysis is facilitated, and safety and reliability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pyrolysis, in particular to a pyrolysis device for recovering precious metals from waste catalysts. Background Art

[0002] A catalyst, also known as a catalyst, is a substance that changes the reaction rate without changing the overall standard Gibbs free energy of the reaction. A substance that can alter the reaction rate of other substances in a chemical reaction while maintaining its own mass and chemical properties is called a catalyst. Precious metals are often added as active ingredients during the catalyst preparation process. Although the form, structure, and quantity of certain catalyst components change during use, spent catalysts still contain a considerable amount of precious metals. Recycling and reuse of precious metal resources in spent catalysts is essential.

[0003] At present, it is inconvenient to pre-treat the waste catalyst materials during pyrolysis in traditional pyrolysis furnaces, which results in that the pyrolysis efficiency of the waste catalyst with a large volume is easily affected during pyrolysis. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A pyrolysis device for recovering precious metals from waste catalysts, comprising: a frame, and a pyrolysis mechanism mounted on the top of the frame; The pyrolysis mechanism includes a pyrolysis furnace and a heating ring, wherein the pyrolysis furnace is fixedly mounted on the top of a frame, and the heating ring is mounted on the surface of the pyrolysis furnace. A protective cover is fixedly mounted in the middle of the surface of the pyrolysis furnace, and an insulation layer is fixedly connected to the inner side of the protective cover. A heat utilization component is mounted on the side of the surface of the protective cover. The heating ring is used to heat the waste catalyst material falling into the pyrolysis furnace to perform pyrolysis. The spiral shape of the heating ring can increase the contact area between the heating ring and the pyrolysis furnace, thereby promoting the heating ring to pyrolyze the waste catalyst material in the pyrolysis furnace. A feeding mechanism, which is used to pre-treat the spent catalyst material and is installed in the middle of the top of the pyrolysis furnace; Among them, the feeding mechanism includes a silo and a feeding hopper, the bottom of the silo is fixedly installed in the middle of the top of the pyrolysis furnace, the feeding hopper is installed at the side of the silo surface, a servo motor is fixedly installed in the rectangular frame outside the silo, the output end of the servo motor is fixedly connected with a V-shaped tooth, a crossbeam is slidably installed between the two symmetrical sides of the inner wall of the pyrolysis furnace, the bottom of the crossbeam is fixedly connected with a three-claw tip crushing tooth, the crossbeam extends to the outside of the silo and is hinged between one end of the V-shaped tooth surface with a connecting square rod, the outside of the V-shaped tooth and one end away from the bottom of the connecting square rod is fixedly connected with a driving pin, and a rotating material connecting assembly is installed in the middle of the inner cavity of the silo.

[0005] Preferably, the heating ring is spiral-shaped, and the central axis in the middle of the protective cover coincides with the central axis between the pyrolysis furnaces. The protective cover is wrapped around the surface of the pyrolysis furnace in a circumferential direction, so that a hollow layer is formed between the inner wall of the protective cover and the surface of the pyrolysis furnace, which can play a role in preliminary heat preservation. The heat preservation layer is installed on the inner wall of the protective cover to insulate the pyrolysis furnace again, which can reduce heat dissipation.

[0006] Preferably, the heat utilization component includes a suction fan, which is fixedly installed on the side of the surface of the protective cover shell. The air intake of the suction fan is connected to a trumpet-shaped air pipe, and the end of the trumpet-shaped air pipe away from the suction fan passes through the protective cover shell and the insulation layer and extends to the interior thereof. The air outlet of the suction fan is connected to an air duct, and a heating pipe is fixedly installed on the outer circular surface of the air duct, and the heating pipe is spiral.

[0007] Preferably, the heating pipe is hollow, and the bottom end of the heating pipe passes through the protective cover shell and the insulation layer and extends to the interior thereof, and the air duct is installed vertically.

[0008] Preferably, the crossbeam is installed horizontally, the connecting square rod is installed obliquely, and the V-shaped gear and the servo motor are installed at the same height.

[0009] Preferably, the tip of the three-claw tip crushing tooth faces downward, there are four three-claw tip crushing teeth, and the four three-claw tip crushing teeth are evenly distributed in the middle of the bottom of the beam.

[0010] Preferably, the rotating material receiving assembly includes a rotating roller, a gear plate and a right-angle tube, the rotating roller is rotatably installed in the middle of the inner cavity of the silo, and the rotating roller is installed directly below the crossbeam, both ends of the surface of the rotating roller penetrate the inner wall of the silo and extend to its outside, the gear plate is fixedly installed at one end of the surface of the rotating roller, the right-angle tube is rotatably installed away from the gear plate through a rotating connector and the rotating roller, the outer circumferential surface of the rotating roller is provided with a semicircular groove, the interior of the rotating roller is provided with an air hole, the air outlet of the air hole is fixedly connected to a partition net, the rotation of the output end of the servo motor can drive the V-shaped teeth to rotate, so that the toggle pin will be driven by the V-shaped teeth to rotate in a circular manner, and the toggle pin is engaged with the edge of the gear plate, so that the gear plate is subjected to the toggle force of the toggle pin, and can drive the rotating roller to rotate intermittently through the gear plate, and fit the surface of the rotating roller through the discharge port at the bottom of the feed hopper, and the waste catalyst material in the feed hopper slides into the inside of the semicircular groove, thereby performing intermittent feeding of the waste catalyst material, and it is not easy to cause material accumulation and blockage.

[0011] Preferably, the air inlet end of the air hole is connected to the right-angle tube, and the semicircular grooves are evenly distributed on the outer circumference of the rotating roller and extend to the inside of the insulation layer through the bottom end of the heating pipe. The heating pipe is hollow, so that the air in the heating pipe is heated by heat transfer, thereby preheating the airway and keeping the airway at a constant temperature. The suction force of the suction fan is used to suck out part of the hot air in the insulation layer through the trumpet-shaped air pipe, and the top of the air duct is connected with the bottom end of the right-angle tube, so that the hot air enters the interior of the air hole under the transportation of the air duct and the right-angle tube, and is ejected into the silo from the air outlet of the air hole, so that the waste catalyst material falling into the semicircular groove can be preheated, and the mutual connection between the structures is fully utilized to reuse the heat.

[0012] As the V-shaped teeth rotate, and combined with the connecting square rod hingedly installed between one end of the beam extending to the outside of the silo and one end of the V-shaped tooth surface, the connecting square rod will exert a downward pulling force on the beam, and the beam will drive the three-claw tip crushing teeth to move downward, so that the waste catalyst material in the semicircular groove at the top of the rotating roller can be punched, so that the waste catalyst material is broken into small particles, thereby pre-treating the waste catalyst material. With continuous rotation, the crushed small particles of waste catalyst material can be put into the interior of the pyrolysis furnace.

[0013] Preferably, a purification mechanism is installed on the side of the frame surface, and the purification mechanism includes a purification tank and an exhaust pipe. The bottom of the purification tank is fixedly installed on the side of the frame surface, and the exhaust pipe is fixedly installed on the side of the top of the purification tank. A flue gas fan is installed in the middle of the top of the purification tank, and the air outlet of the flue gas fan is connected to a circular tube. A cylinder is fixedly installed on the outer circumference of the circular tube. A through hole is opened at the bottom of the outer circumference of the circular tube, and an elliptical hole is opened at the bottom of the inner cavity of the cylinder. The top of the outer circumference of the cylinder is connected to There is a bent pipe, which uses a flue gas fan to suck out the flue gas from the top of the pyrolysis furnace cavity and discharge it into the inside of the round pipe, so that the flue gas is discharged from the through hole and contacts the flue gas purification liquid in the cylinder, and floats upward and enters the inside of the bent pipe. The flue gas contacts the flue gas purification liquid in the purification tank again from the bottom of the bent pipe, so that the flue gas route is curved and fully contacts the flue gas purification liquid, which can react and absorb harmful substances in the flue gas, reduce the emission of harmful substances, and play a purification role. Finally, the purified gas is discharged from the exhaust pipe.

[0014] Preferably, the air inlet of the flue gas fan passes through the top of the protective cover shell and the top of the pyrolysis furnace, the axis of the circular tube, the axis of the cylinder and the axis of the purification tank coincide with each other, and the bent tubes are evenly distributed on the top of the outer surface of the cylinder.

[0015] The present invention provides a pyrolysis device for recovering precious metals from waste catalysts. It has the following beneficial effects: 1. This pyrolysis device for recovering precious metals from waste catalysts uses a heating coil to heat the waste catalyst material that falls into the pyrolysis furnace to achieve pyrolysis. The spiral shape of the heating coil increases the contact area between the heating coil and the pyrolysis furnace, thereby promoting the heating coil to pyrolyze the waste catalyst material in the pyrolysis furnace.

[0016] 2. The pyrolysis device for recovering precious metals from waste catalysts is wrapped around the surface of the pyrolysis furnace in a circumferential direction through a protective cover, so that a hollow layer is formed between the inner wall of the protective cover and the surface of the pyrolysis furnace, which can play a preliminary role in heat preservation. The heat preservation layer is installed on the inner wall of the protective cover to insulate the pyrolysis furnace again, thereby reducing heat dissipation.

[0017] 3. The pyrolysis device for recovering precious metals from waste catalysts utilizes the rotation of the output end of the servo motor to drive the V-shaped teeth to rotate, so that the toggle pin is driven by the V-shaped teeth to rotate in a circle, and the toggle pin is meshed with the edge of the gear plate, so that the gear plate is driven by the toggle pin to drive the rotating roller to rotate intermittently through the gear plate, and the discharge port at the bottom of the feed hopper fits with the surface of the rotating roller, and the waste catalyst material in the feed hopper slides into the inside of the semicircular groove, thereby performing intermittent feeding of the waste catalyst material, and is less likely to cause material accumulation and blockage.

[0018] 4. The pyrolysis device for recovering precious metals from waste catalysts extends to the inside of the insulation layer through the bottom end of the heating pipe, and the heating pipe is hollow, so that the air in the heating pipe is heated by heat transfer, which can preheat the airway and keep the airway at a constant temperature. The suction force of the suction fan is used to suck out part of the hot air in the insulation layer through the trumpet-shaped air pipe, and the top of the airway is connected with the bottom end of the right-angle pipe, so that the hot air enters the interior of the air hole under the transportation of the airway and the right-angle pipe, and is ejected into the silo from the air outlet of the air hole, so that the waste catalyst material falling into the semicircular groove can be preheated.

[0019] 5. The pyrolysis device for recovering precious metals from waste catalysts, as the V-shaped teeth rotate, causes the connecting square rod to exert a downward pulling force on the crossbeam, and causes the crossbeam to drive the three-claw tip crushing teeth to move downward, so that the waste catalyst material in the semicircular groove at the top of the rotating roller can be punched, so that the waste catalyst material is broken into small particles, thereby pre-treating the waste catalyst material. With continuous rotation, the crushed small particles of waste catalyst material can be put into the interior of the pyrolysis furnace.

[0020] 6. The pyrolysis device for recovering precious metals from waste catalysts uses a flue gas fan to suck out the flue gas from the top of the pyrolysis furnace cavity and discharge it into the inside of the circular tube, so that the flue gas is discharged from the through hole and contacts the flue gas purification liquid in the cylinder, floats upward, and enters the inside of the bent tube. The flue gas contacts the flue gas purification liquid in the purification tank again from the bottom of the bent tube, so that the flue gas route is curved and fully contacts the flue gas purification liquid, which can react and absorb harmful substances in the flue gas, reduce the emission of harmful substances, and play a purifying role. Finally, the purified gas is discharged from the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the pyrolysis device for recovering precious metals from waste catalysts of the present invention; Figure 2 This is a schematic diagram of the internal structure of a cross-section of a pyrolysis device for recovering precious metals from waste catalysts according to the present invention; Figure 3 Schematic diagram of the connection structure between the pyrolysis mechanism and the frame of the present invention; Figure 4 This is a schematic diagram of the overall structure of the pyrolysis mechanism of the present invention; Figure 5 Schematic diagram of the connection structure between the feeding mechanism and the pyrolysis furnace of the present invention; Figure 6 This is a schematic diagram of the overall structure of the feeding mechanism of the present invention; Figure 7 This is a schematic diagram of the overall structure of the rotary material connection assembly of the present invention; Figure 8It is a schematic diagram of the connection structure between the purification mechanism, the frame and the pyrolysis furnace of the present invention.

[0022] In the figure: 1. Frame; 2. Pyrolysis mechanism; 3. Feeding mechanism; 4. Purification mechanism; 21. Pyrolysis furnace; 22. Heating coil; 23. Protective cover; 24. Insulation layer; 25. Heat utilization component; 251. Suction fan; 252. Trumpet-shaped air pipe; 253. Air duct; 254. Heat tracing pipe; 31. Silo; 32. Feed hopper; 33. Servo motor; 34. V-shaped gear; 35. Driving pin; 36. Crossbeam; 37. Three-claw tip crushing teeth; 38. Connecting square rod; 39. Rotating material connection assembly; 391. Rotating roller; 392. Gear plate; 393. Semicircular groove; 394. Air hole; 395. Partition screen; 396. Right-angle pipe; 41. Purification tank; 42. Exhaust pipe; 43. Flue gas fan; 44. Round pipe; 45. Cylinder; 46. Through hole; 47. Elliptical hole; 48. Bend pipe. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The first embodiment, as Figures 1 to 4 As shown, the present invention provides a technical solution: A pyrolysis device for recovering precious metals from waste catalysts, comprising: A frame 1, and a pyrolysis mechanism 2 installed on the top of the frame 1; The pyrolysis mechanism 2 includes a pyrolysis furnace 21 and a heating ring 22. The pyrolysis furnace 21 is fixedly mounted on the top of the frame 1. The heating ring 22 is mounted on the surface of the pyrolysis furnace 21. A protective cover 23 is fixedly mounted in the middle of the surface of the pyrolysis furnace 21. The inner side of the protective cover 23 is fixedly connected with a thermal insulation layer 24. A heat utilization component 25 is mounted on the side of the surface of the protective cover 23. When the staff turns on the heating ring 22 to work, the heating ring 22 is used to heat the waste catalyst material falling into the pyrolysis furnace 21, thereby performing pyrolysis. Moreover, the spiral shape of the heating ring 22 can increase the contact area between the heating ring 22 and the pyrolysis furnace 21, thereby promoting the heating ring 22 to pyrolyze the waste catalyst material in the pyrolysis furnace 21. The heating coil 22 is spiral-shaped, and the central axis of the middle of the protective cover shell 23 coincides with the central axis of the pyrolysis furnace 21.

[0025] By wrapping the protective cover shell 23 around the surface of the pyrolysis furnace 21 along the circumferential direction, a hollow layer is formed between the inner wall of the protective cover shell 23 and the surface of the pyrolysis furnace 21, which can provide preliminary insulation. The insulation layer 24 is installed on the inner wall of the protective cover shell 23 to further insulate the pyrolysis furnace 21.

[0026] The heat utilization component 25 includes a suction fan 251, which is fixedly installed on the side of the surface of the protective cover shell 23. The air intake of the suction fan 251 is connected to a trumpet-shaped air pipe 252. The end of the trumpet-shaped air pipe 252 away from the suction fan 251 passes through the protective cover shell 23 and the insulation layer 24 and extends to the interior thereof. The air outlet of the suction fan 251 is connected to an air duct 253. A heating pipe 254 is fixedly installed on the outer circular surface of the air duct 253, and the heating pipe 254 is spiral.

[0027] The heating pipe 254 is hollow, and the bottom end of the heating pipe 254 passes through the protective cover shell 23 and the insulation layer 24 and extends to the inside thereof. The air duct 253 is installed vertically.

[0028] The second embodiment, based on the first embodiment, see Figures 1 to 7 As shown: The feeding mechanism 3 is used to pre-treat the waste catalyst material and is installed in the middle of the top of the pyrolysis furnace 21; Among them, the feeding mechanism 3 includes a silo 31 and a feed hopper 32. The bottom of the silo 31 is fixedly installed in the middle of the top of the pyrolysis furnace 21, and the feed hopper 32 is installed on the side of the surface of the silo 31. A servo motor 33 is fixedly installed in the rectangular frame outside the silo 31, and the output end of the servo motor 33 is fixedly connected to a V-shaped tooth 34. A crossbeam 36 is slidably installed between the symmetrical sides of the inner wall of the pyrolysis furnace 21. The bottom of the crossbeam 36 is fixedly connected to a three-claw tip crushing tooth 37. A connecting square rod 38 is hinged between one end of the crossbeam 36 extending to the outside of the silo 31 and one end of the surface of the V-shaped tooth 34. The outer side of the V-shaped tooth 34 and one end away from the bottom of the connecting square rod 38 is fixedly connected to a toggle pin 35. A rotating material receiving assembly 39 is installed in the middle of the inner cavity of the silo 31.

[0029] The crossbeam 36 is installed horizontally, the connecting square rod 38 is installed obliquely, and the V-shaped gear 34 and the servo motor 33 are installed at the same height.

[0030] The tips of the three-claw tip crushing teeth 37 face downwards, there are four three-claw tip crushing teeth 37 , and the four three-claw tip crushing teeth 37 are evenly distributed in the middle of the bottom of the beam 36 .

[0031] The rotating material receiving assembly 39 includes a rotating roller 391, a gear plate 392 and a right-angle tube 396. The rotating roller 391 is rotatably installed in the middle of the inner cavity of the silo 31, and the rotating roller 391 is installed directly below the crossbeam 36. Both ends of the surface of the rotating roller 391 pass through the inner wall of the silo 31 and extend to its outside. The gear plate 392 is fixedly installed at one end of the surface of the rotating roller 391. The right-angle tube 396 is rotatably installed away from the gear plate 392 with the rotating roller 391 through a rotating connector. A semicircular groove 393 is provided on the outer circumference of the rotating roller 391, and an air hole 394 is provided inside the rotating roller 391. The air outlet of the air hole 394 is fixedly connected to a partition 395. The waste catalyst material is transported through an external loading device, and the waste The catalyst material is poured into the interior of the feed hopper 32, and the staff starts the servo motor 33 to work. The rotation of the output end of the servo motor 33 can drive the V-shaped teeth 34 to rotate, so that the driving pin 35 will be driven by the V-shaped teeth 34 to rotate in a circle, and the driving pin 35 is engaged with the edge of the gear plate 392, so that the gear plate 392 is subjected to the driving force of the driving pin 35, and the gear plate 392 can drive the rotating roller 391 to rotate intermittently, and the discharge port at the bottom of the feed hopper 32 is fitted with the surface of the rotating roller 391, and the waste catalyst material in the feed hopper 32 slides into the interior of the semicircular groove 393, thereby performing intermittent feeding of the waste catalyst material to avoid material accumulation and blockage.

[0032] The air inlet end of the air hole 394 is connected to the right-angle tube 396, and the semicircular grooves 393 are evenly distributed on the outer surface of the rotating roller 391, and extend to the inside of the insulation layer 24 through the bottom end of the heating pipe 254. The heating pipe 254 is hollow, so that the air in the heating pipe 254 is heated by heat transfer, which can preheat the air channel 253, so that the air channel 253 always maintains a constant temperature state. The staff turns on the suction fan 251 to work, uses the suction force of the suction fan 251, and sucks out part of the hot air in the insulation layer 24 through the trumpet-shaped air pipe 252, and combines the top of the air channel 253 with the bottom end of the right-angle tube 396 to allow the hot air to enter the interior of the air hole 394 under the transportation of the air channel 253 and the right-angle tube 396, and be ejected into the silo 31 from the air outlet of the air hole 394, preheating the waste catalyst material falling into the semicircular groove 393.

[0033] As the V-shaped teeth 34 rotate, and combined with the connecting square rod 38 hingedly installed between one end of the crossbeam 36 extending to the outside of the silo 31 and one end of the surface of the V-shaped teeth 34, the connecting square rod 38 will apply a downward pulling force to the crossbeam 36, and the crossbeam 36 will drive the three-claw tip crushing teeth 37 to move downward, so that the rotating roller 391 can be rotated to the uppermost semicircular groove 393 to punch the waste catalyst material, so that the waste catalyst material is broken into small particles, thereby pre-treating the waste catalyst material. With continuous rotation, the crushed small-particle waste catalyst material can be put into the interior of the pyrolysis furnace 21.

[0034] The third embodiment, based on the first and second embodiments, see Figures 1 to 8 As shown: A purification mechanism 4 is installed on the side of the surface of the frame 1. The purification mechanism 4 includes a purification tank 41 and an exhaust pipe 42. The bottom of the purification tank 41 is fixedly installed on the side of the surface of the frame 1. The exhaust pipe 42 is fixedly installed on the side of the top of the purification tank 41. A flue gas fan 43 is installed in the middle of the top of the purification tank 41. The air outlet of the flue gas fan 43 is connected with a circular tube 44. A cylinder 45 is fixedly installed on the outer surface of the circular tube 44. A through hole 46 is provided at the bottom of the outer surface of the circular tube 44. An elliptical hole 47 is provided at the bottom of the inner cavity of the cylinder 45. A bent pipe 48 is connected to the top of the outer surface of the cylinder 45. An appropriate amount of flue gas purification liquid is injected into the interior of the purification tank 41 from the circular opening at the top of the exhaust pipe 42. The flue gas purification liquid is discharged from the elliptical hole 44. 7 enters the interior of the insulation layer 24, so that the liquid level of the flue gas purification liquid exceeds the through hole 46, and the bottom end of the bent tube 48 extends to the interior of the flue gas purification liquid in the purification tank 41, and the flue gas at the top of the inner cavity of the pyrolysis furnace 21 is sucked out by the flue gas fan 43 and discharged into the interior of the circular tube 44, so that the flue gas is discharged from the through hole 46 and contacts the flue gas purification liquid in the cylinder 45, and floats upward and enters the interior of the bent tube 48, and the flue gas contacts the flue gas purification liquid in the purification tank 41 again from the bottom end of the bent tube 48, so that the route of the flue gas is curved and fully contacts the flue gas purification liquid, so that the harmful substances in the flue gas can be reacted and absorbed, thereby reducing the emission of harmful substances, and finally the purified gas is discharged from the exhaust pipe 42.

[0035] The air inlet of the flue gas fan 43 passes through the top of the protective cover shell 23 and the top of the pyrolysis furnace 21. The axis of the circular tube 44 and the axis of the cylinder 45 coincide with the axis of the purification tank 41. The bent tubes 48 are evenly distributed on the top of the outer surface of the cylinder 45.

[0036] When in use, first inject an appropriate amount of flue gas purification liquid into the interior of the purification tank 41 from the circular opening at the top of the exhaust pipe 42, and open the top cover of the feed hopper 32. The waste catalyst material is transported through the external loading equipment and poured into the interior of the feed hopper 32. The feed hopper 32 is filled with the waste catalyst material, and the top cover of the feed hopper 32 is closed, so that the pyrolysis furnace 21 and the silo 31 form a closed space; At this time, the staff starts the servo motor 33 to work, and the rotation of the output end of the servo motor 33 can drive the V-shaped teeth 34 to rotate, so that the toggle pin 35 is driven by the V-shaped teeth 34 to rotate in a circular manner, and the toggle pin 35 is meshed with the edge of the gear plate 392, so that the gear plate 392 is driven by the toggle pin 35. The gear plate 392 can drive the rotating roller 391 to rotate intermittently, and the discharge port at the bottom of the feed hopper 32 is in contact with the surface of the rotating roller 391, and the waste catalyst material in the feed hopper 32 slides into the interior of the semicircular groove 393, thereby performing intermittent feeding of the waste catalyst material to avoid material accumulation and blockage; The bottom end of the heat tracing pipe 254 extends to the inside of the insulation layer 24, and the heat tracing pipe 254 is hollow, so that the air in the heat tracing pipe 254 is heated by heat transfer, which can preheat the air channel 253, so that the air channel 253 always maintains a constant temperature state, and the staff turns on the suction fan 251 to work, and uses the suction force of the suction fan 251 to suck out part of the hot air in the insulation layer 24 through the trumpet-shaped air pipe 252, and combines the top of the air channel 253 with the bottom end of the right-angle pipe 396 to connect, so that the hot air enters the interior of the air hole 394 under the transportation of the air channel 253 and the right-angle pipe 396, and is ejected into the silo 31 from the air outlet of the air hole 394, so as to preheat the waste catalyst material falling into the semicircular groove 393; As the V-shaped teeth 34 rotate, and in combination with the connecting square rod 38 hingedly installed between one end of the crossbeam 36 extending to the outside of the silo 31 and one end of the surface of the V-shaped teeth 34, the connecting square rod 38 applies a downward pulling force to the crossbeam 36, and the crossbeam 36 drives the three-claw tip crushing teeth 37 to move downward, so that the rotating roller 391 can rotate to the uppermost semicircular groove 393 to punch the waste catalyst material, so that the waste catalyst material is crushed into small particles, thereby pre-treating the waste catalyst material. With continued rotation, the crushed small particles of waste catalyst material can be put into the interior of the pyrolysis furnace 21; The staff turns on the heating coil 22 to heat the waste catalyst material falling into the pyrolysis furnace 21, thereby performing pyrolysis. The spiral shape of the heating coil 22 increases the contact area between the heating coil 22 and the pyrolysis furnace 21, thereby promoting the pyrolysis of the waste catalyst material in the pyrolysis furnace 21 by the heating coil 22. The protective cover 23 is wrapped around the surface of the pyrolysis furnace 21 along the circumferential direction, so that a hollow layer is formed between the inner wall of the protective cover 23 and the surface of the pyrolysis furnace 21, which can play a preliminary role in heat preservation. The thermal insulation layer 24 is installed on the inner wall of the protective cover 23 to further insulate the pyrolysis furnace 21. At the same time, the flue gas at the top of the inner cavity of the pyrolysis furnace 21 is sucked out by the flue gas fan 43 and discharged into the interior of the circular tube 44, so that the flue gas is discharged from the through hole 46 and contacts the flue gas purification liquid in the cylinder 45, and floats upward and enters the interior of the bent tube 48. The flue gas contacts the flue gas purification liquid in the purification tank 41 again from the bottom end of the bent tube 48, so that the flue gas route is curved and fully contacts the flue gas purification liquid, so that harmful substances in the flue gas can be reacted and absorbed, thereby reducing the emission of harmful substances, and finally the purified gas is discharged from the exhaust pipe 42.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pyrolysis device for recovering precious metals from waste catalysts, characterized in that: include: A frame (1), and a pyrolysis mechanism (2) mounted on the top of the frame (1); The pyrolysis mechanism (2) includes a pyrolysis furnace (21) and a heating ring (22), wherein the pyrolysis furnace (21) is fixedly mounted on the top of the frame (1), and the heating ring (22) is mounted on the surface of the pyrolysis furnace (21). A protective cover (23) is fixedly mounted in the middle of the surface of the pyrolysis furnace (21), an inner side surface of the protective cover (23) is fixedly connected to a heat insulation layer (24), and a heat utilization component (25) is mounted on the side of the surface of the protective cover (23); A feeding mechanism (3), the feeding mechanism (3) is used to pre-treat the waste catalyst material, and the feeding mechanism (3) is installed in the middle of the top of the pyrolysis furnace (21); The feeding mechanism (3) includes a silo (31) and a feed hopper (32), the bottom of the silo (31) is fixedly installed in the middle of the top of the pyrolysis furnace (21), the feed hopper (32) is installed on the side of the surface of the silo (31), a servo motor (33) is fixedly installed in the rectangular frame outside the silo (31), and the output end of the servo motor (33) is fixedly connected to a V-shaped tooth (34), and the inner wall of the pyrolysis furnace (21) is symmetrical between the two sides. A crossbeam (36) is slidably mounted, and a three-claw tip crushing tooth (37) is fixedly connected to the bottom of the crossbeam (36). A connecting square rod (38) is hingedly connected between one end of the crossbeam (36) extending to the outside of the silo (31) and one end of the surface of the V-shaped tooth (34). A driving pin (35) is fixedly connected to the outside of the V-shaped tooth (34) and one end away from the bottom of the connecting square rod (38). A rotating material receiving assembly (39) is installed in the middle of the inner cavity of the silo (31).

2. The pyrolysis device for recovering precious metals from waste catalysts according to claim 1, characterized in that: The heating ring (22) is spiral-shaped, and the central axis of the middle of the protective cover shell (23) coincides with the central axis of the pyrolysis furnace (21).

3. The pyrolysis device for recovering precious metals from waste catalysts according to claim 1, characterized in that: The heat utilization component (25) includes a suction fan (251), which is fixedly installed on the side of the surface of the protective cover shell (23). The air intake of the suction fan (251) is connected to a trumpet-shaped air pipe (252), and the end of the trumpet-shaped air pipe (252) away from the suction fan (251) passes through the protective cover shell (23) and the thermal insulation layer (24) and extends into the interior thereof. The air outlet of the suction fan (251) is connected to an air duct (253), and a heating pipe (254) is fixedly installed on the outer cylindrical surface of the air duct (253), and the heating pipe (254) is spiral.

4. The pyrolysis device for recovering precious metals from waste catalysts according to claim 3, characterized in that: The heating pipe (254) is hollow, and the bottom end of the heating pipe (254) passes through the protective cover shell (23) and the insulation layer (24) and extends into the interior thereof. The air duct (253) is installed vertically.

5. The pyrolysis device for recovering precious metals from waste catalysts according to claim 1, characterized in that: The crossbeam (36) is installed horizontally, the connecting square rod (38) is installed obliquely, and the V-shaped gear (34) and the servo motor (33) are installed at the same height.

6. The pyrolysis device for recovering precious metals from waste catalysts according to claim 1, characterized in that: The tips of the three-claw tip crushing teeth (37) face downwards, there are four three-claw tip crushing teeth (37), and the four three-claw tip crushing teeth (37) are evenly distributed in the middle of the bottom of the beam (36).

7. The pyrolysis device for recovering precious metals from waste catalysts according to claim 1, characterized in that: The rotating material receiving assembly (39) includes a rotating roller (391), a gear plate (392) and a right-angle tube (396). The rotating roller (391) is rotatably mounted in the middle of the inner cavity of the silo (31), and the rotating roller (391) is mounted directly below the crossbeam (36). Both ends of the surface of the rotating roller (391) penetrate the inner wall of the silo (31) and extend to the outside thereof. The gear plate (392) is fixedly mounted on one end of the surface of the rotating roller (391). The right-angle tube (396) is rotatably mounted away from the gear plate (392) via a rotating connector and the rotating roller (391). A semicircular groove (393) is provided on the outer circumference of the rotating roller (391). An air hole (394) is provided inside the rotating roller (391). The air outlet of the air hole (394) is fixedly connected to a partition (395).

8. The pyrolysis device for recovering precious metals from waste catalysts according to claim 7, characterized in that: The air inlet end of the air hole (394) is connected to the right-angle tube (396), and the semicircular grooves (393) are evenly distributed on the outer circumferential surface of the rotating roller (391).

9. The pyrolysis device for recovering precious metals from waste catalysts according to claim 1, characterized in that: A purification mechanism (4) is installed on the side of the surface of the frame (1), and the purification mechanism (4) includes a purification tank (41) and an exhaust pipe (42). The bottom of the purification tank (41) is fixedly installed on the side of the surface of the frame (1), and the exhaust pipe (42) is fixedly installed on the side of the top of the purification tank (41). A flue gas fan (43) is installed in the middle of the top of the purification tank (41), and the air outlet of the flue gas fan (43) is connected to a circular tube (44). A cylinder (45) is fixedly installed on the outer circumference of the circular tube (44), a through hole (46) is opened at the bottom of the outer circumference of the circular tube (44), an elliptical hole (47) is opened at the bottom of the inner cavity of the cylinder (45), and a bent tube (48) is connected to the top of the outer circumference of the cylinder (45).

10. The pyrolysis device for recovering precious metals from waste catalysts according to claim 9, characterized in that: The air inlet of the flue gas fan (43) passes through the top of the protective cover (23) and the top of the pyrolysis furnace (21); the axis of the circular tube (44), the axis of the cylinder (45) and the axis of the purification tank (41) coincide with each other; and the bent tubes (48) are evenly distributed on the top of the outer surface of the cylinder (45).

Images